Filter funnel



May 3,1927. 1,627,083

. Y K. G. FRASER v y FILTER FUNNEL Filed Jan. 26. 1921 2 Sheet s-She et 1 K. G. FRASER FILTER FUNNEL May 3. 1-927.

' Filed Jan. 26. 1921 2 sheets-Sheet 2 Patented May 3, 1927.

' KENNETH e. FRAS R, E WELLTON, ARIZONA.

FILTER FUNNEL.

Application filed January 26, 1921-. Serial No. 440,197.

My invention relates to filter tunnels and in particular to a tunnel of this type which is peculiarly adapted for use in handling highly combustible liquids, such as gasoline and fithelike. w 7 1 It is the primary object of the invention to provide a funnel which is of such construction that the combustible liquid, or any gas evolved thereby, can not become ignited by charges of static electricity generated within the funnel; This object is accomplished by preventing sparking between internal metallic parts of the funnel. I propose to construct the tunnel in such a manner that the filtering element, which is customarily made of chamois skin or other dielectric material, will not intervene between metallic parts and act as an insulator. In

my funnel the body is made of metal from.

inlet to outlet and presents an uninterrupted andcontinuous electrical conductor from the inlet past the filtering element to the outlet or discharge end ofthe funnel. Any static charges which are produced inthe.

fore find a path of conduction through the metallic body into the tank or other receptacle with which the funnel comes into contact in use.

A further object of the invention is to provide-a filter funnel of such construction that one or more filtering elements may be mounted in the body of the funnel'in'fixed position spaced from each other and from wherein it'would settle on and clog the top filtering element. In addition, this cover prevents the liquid entering the funnel from 7 being blown and dissipated by the wind. 1

It is an object also to provide a bottom rest in the form of an annular fiangesurrounding the outlet which is adapted to supbeing served and which will contact with breakage, or to aid in funnel above the filtering element may there the discharge end of the funnel so that the filtering elements can not sag and-touch Another object is to provide a filter-fr nnel port the funnel on the tank or container the rim of the filler hole in the tank and thus exclude dust from the latter. The funnel is therefore self-sustaining and in efi'ect a dust-proof closure for thefiller hole while applied thereto.

v further object is to provide a :funnel having efficient means for permitting escape of air from the tank being served. This is accomplished by providing an air vent in the mechanical construction of the funnel, whlch consists of a. pipe'concentric to and surrounding the same with one or more ports opening into the atmosphere above the bottom rest.

A still further object is to'provide a filter funnel comprlsing a plurality of demountable parts which may include one ormore filtering elements and which may be assembled or disassembled readily to facilitate the replacement of. parts in case of Wear or packing for shipment or storage. v In general, it is my purpose to provide a filter funnelthat will insure the safe and economical delivery of; clean, uncontaminated gasoline, oil, chemicals, or the like, with thegreate'st possible speed.

Other objects may appear as the following 7 specification is read in conjunction with the accompanying drawings, in which:

Fig. 1 is a side elevation of the device showing the hose opening in the cover open; Fig. 2 1s a vertical sectlonal'view on line 2'-2 of Fig. 1;

"Fig. '3 is a transverse sectional view on theline 33 of F ig. Quand i i Fig. i is a side elevation showing the filter-. mg elements d sconnected and separated slightly from each other and from the cover and base.

; In the drawings'I have disclosed a filter funnel having two filtering elements mount-- ed in superimposed relation between the base and cover of the device, but it is to be understood that only one, ormore than two filtering elements may be employed without departing from thescope of the invention.

Each filtering element'consists preferably of an annular side wall 10 of suitable metal,

a filter proper 11 of chamois skin or other.

desired material, and means for supporting the'filter 11 in fixed position within the wall 10. The supporting means for the filter proper may consist of a metallic ring: 12, pressed 'into such form that it presents a] groove '13, and an annular wooden filler: 14, I

which is adaptedito fit within thegroove and the ring to bind the marginaledges of the filter therein. The supporting ring is adapted to be mounted inside the side wall 10 midway between its upper and lower edges .and may be secured fixedly in this position by any suitable means. However, I find it convenient to employ a plurality of radial bolts 15 for this purpose. These bolts extend through registering apertures .in the side wall, supporting ring, wooden fillerand filter proper.

At leastone filtering element used in each tunnel preferably has the upper edge :of its side wall provided with an out-turned bead l6 enclosing a wire :17. The bead has portions cut away at relatively spaced points around its periphery to expose short sections 18 of the wire for a purpose which .will .be described presently.v V

'llniorder that the several filtering elements may be nested in superimposed relation in the manner shown particularly in 2 of the drawings with the ifiltfil proper or each filtering element spaced vertically from the adjoining filter, or filters, the upper portion o-t-the side wall of each filtering element may be expanded slightly so that the lower portion of :the side wallof another zfiltering elementmay .fit therein and rest ;upon the narrow shoulder 19 thus formed.

The filtering-element which is to form part of a filter tunnel, or aset of these elements, may be mounted .upon a base-20. This abase preferably has a' downwardly converging frusto-conical bottom wall 21 :and ,a side wall 22 rising from the bottom wall and adapted to have the bottom edge of the fi'lteringPelement, or the lowermost one lot a setoi filtering elements, fitted therein. At the marginal edges of :the base a plurality of .perforated brackets 28 :are mounted and clamping members 24 in the form of screw.- threaded rods, or the like, extend through the perforations in the respective brackets. VVing-nuts 25 are preferably threaded onto the lower ends of the clamping members he neath the brackets. The upper ends of the clamping members are provided with books 26 (see Fig. 2.) for engagement with the .ex-

' posed sections 18. of the (bead wire of the filter element. In case more than one zfiltering element is used in the funnel, at least that element which is mountedat the top of the series of filtering .elements should have the bead wire with exposed sections just mentioned. Byadjusting the wing-nuts 25, the filtering element, or. elements, may be clamped securely together and to ithe base, whereby fluid-tight joints are provided between the filtering element and the Ebase, and between filtering elements when a plurality are employed.

While one specific form ofclainping is disclosed, it is lob-vious that some other suitable clamping device may be resorted to in practice. I do not limit myself .necessarily toany particular type.

Upon reference to 2, it will be noted that the c'hamois filters are all maintained in spaced relation to each other and the bottom filter is spaced from the bottom wall 0f the funnel base. This feature prevents In Iorder to reinforce the bottom wall of the tunnel base it may be buttressed by means of the radial ribs 12.7. A bottom rest for the funnel may ab e provided hy securing ansannular plate 28t0 the ribs 27 :atithe centeroi gthe base. A discharge pipe 29 preferably extends through the plate 128 from .the

interior of the base'to apoint below the Said plate .sufliciently spaced therefrom for penetration through the lfiller hole of the tank or .other receptacle which may be served by the tunnel. When the tunnel is used in this manner, the bottom rest will bear against the edges of the filler hole and thus effectively seal the latter against entrance of wind-blown dust or other foreign matter, wzhile lfunctioningadditionallyas means for supporting-the :funnel rigidly on the tank.

{For the purpose of permitting. escape of air from :the :tank .while it is :being served 1 have provided an air escape pipe .30 surrounding the discharge pipe 29 in spaced elation thereto andconnected with the :fun-

nel base in such a manner that it does .not

communicate with the interior of the funnel. Air vents 31::may be provided in the bottom rest in communication with :the annular air channel between the discharge pipe 29 and the air escap e pipe30. These-vents open to the atmosphere above the bottom rest an may ,be protected against entrance of dust or the like1by means of ,awv'ire screen 32. r The air escape pipe .30 may be in the form of a flexible metal hose .With a stop-cock-33 razedo i a a lgo s neck, s -,shown in Big. 2.

The lcover 3 4: for .the funnel has a flared lower edge 35 adapted :to fit the upper {edge of the :filter element, or lupper-most element of a series. This cover has in one side a filler hole 36 ozt' just Sll'fiiClQIltESiZG to permit the insertion of alserving hose andasliding closure :37 for this 511016 is 'JnOunted .in guides 38 .and has a manipulating handle '39. When this closure is in its closed position dust can not .enter the funnel, and, also,

when the filler hole has a hose extending into the same during the act of serving the fu nel, dustcan 1 .t-ent r,;11or can the gasoine b blown and issip ted by the wind.

It will be observed -that, when the various separated readily for the purpose of cleanpacking for shipment or storage.

ing the same, or in order to replace parts in case of wear or breakage. The parts may be disassembled also for convenience in While it is preferable that the metallic parts of the funnel be made of copper'or" brass, any other metal which is a good conductor of electricity and is suitable in other respects may be used. I I claim:'

1. In a filter funnel, a filter body having an inlet and an outlet, a filter disposed within said body, a cover for the inlet having a filler hole therein, a cover for said filler hole, said body having a frusto conical bottom provided with a discharge opening in its apex, a rest for the body in the form of an annular plate surrounding said discharge opening, radial reinforcement ribs provided on the bottom of said body and interposed between same and said rest member.

'2. In a filter funnel, a bottom member having a frusto conical form with a dis charge outlet in its apex, a combined rest and vent for the funnel comprising a horizontal annular plate spaced from the discharge outlet and secured to the bottom member by radial ribs, the vent being covered by a screening, a series of filter ele ments having outer rims which are adapted to be nested together, a cover having a filler hole therein, a closure for said filler hole mounted on said cover, and clamping means on the cover and bottom member for securing the filter elements between them.

In testimony whereof I have aifixed my signature. I

KEN G. FRASER; 

